Mixing box



G. A. ENGERT Feb. 1, 1949.

MIXING BOX 2 Sheets-Sheet 1 Filed July 26, 1946 INVENTOR ATTORNEY Feb. 1, 1949. G, ENGERT 2,460,626

MIXING BOX Filed July 26, 1946 2 Sheets-Sheet 2 6 gin 151mg Barge" 2. By [#M j '7 Claims.

inv tio n relates to mixing apparatus tand v di e t? mer Pe iafle y i s mixing film dent d or i Qne t z .-W r re n i'e i. en .in'bo iiri rslfqrm 0 san i if r .m i' tac f r] are! m in aberra ions "and is haracter zed by f simplicity and adjustability thereby to enhance 'itsefificiency nfiking ipe mak nei wek. a d: weteri o tain thedesired uniform-dispos l'oi to'ck While e e ep js er n mes etom ianfi i .t r aner i a n P i 11 elt v,.lq 'ft. l'el 1 appara es adapted for broad application'in connction "with the mixing of"liquidsribvi ia i r e e he aterie sfI..., 'With the foregoing and varioudothei'jf novel features 'arid a'dvantages and other obiects of ngy Fig. 2 is a sectional elevational view on t'heline v "2-2 of Fig. 1; and

' Fig. 3 isa sectional elevationalview on the line 33 ofFig. 1. Referring now-to the drawings more in=detail, the invention will be fully described.

ZA receptacle or the mixing box proper is indivcated by 2 and has a circular wall4 which extends upwardly from a lower wall 8'. 'Thewall 4 extends from a cylindrical portion to the left as George A; Ehgefr'tL WeStfiefiLfMass; assignor to I Cheney Bigelow WireiWorks, Springfield, Mass., H 1

"wa corporation ofrMassachusetts i. Ij

j iappiieatitmrdiyfze, 194g;saarnay swi in Fig. 1 to conform with an outlet 6 which is a provided in said lower wall"8. The side wall and lower wall may be made from metal plate material suitably formed and secured together as by'weldin'g and there may be a reinforcing band I 0 around the upper side of the box, as shown; '1

A, circular wall l2 extends downwardly from the lower wall 8 which is concentric to the eurvedpart of the wall 4. and 'it has a lower wall l4 secured thereto. The walls I2 and Hprovidea sump ,in

the lower wall 8,

;, A; circularswall 16 is. concentrically I disposed relative to the wall l2 and capped by an uppe'if'wall {1'8 which issecured thereto. Said walls lfi'and lfl'fprovid'e'adome 20 which may be securedto the lower wall [4 as by Welding at 22. y p I 'water inlet 24 is provided which leadsfinto the sump at one side thereof and a stock, inlet 263s provided which also leads into the sump at another'side thereof. It is desirable that these inlets 24 and 26 be located susbtantially opposite to -one another and adjacent the bottom wall l4 below the plane of the upper' portion of th'e donie l; A cylinder 28' which may be called a gate is provided'and is concentrically disposed relative to the side wall I2 of the sump and arms suchfas 30 have outer ends secured thereto and extend inwardly to an anchor member 36 which is rigidly secured thereto; The arms 30 may take" any form desired and they maybe secured to "the cylinder 28 in any convenient manner as by weld mams A weir 36 is provided which preferably is in'tlie form of atube or cylindrical rod formed to extend around the upper end of'the'cylin'der 28. Said weir is's'ecured to the cylinder as by welding at 3 8 Tranisver'se supporting members 40 extend between opposite "wall portions of the box and have opposite ends secured to said wall portions, A bracketflis secured to thememberlfl intermediate opposite ends thereof. A screw '44 has'its lower end secured to the member 32 as by a'pin. "46 andagear 48 is internally screw threadedfor threadedly engaging said screw 44 and rests on the member I2. 1" A shaft SO is rotatable in bearings 52"whicli are"-secured to plates 54 that are fixed to the members 40. Said shaft has a pinion 56 on its inner end which is in engagement Withtha'gear Bi-and a'hand wheel 58 is secured tothe outer-end of said shaft 50. iAs'thesha'ft is rotated in one direction or the other the gear i'srotated ino'ne direction .or the other whereby the 'sh'afti'M being 'in threaded 'eng'agement with the gear the cylinder i's'raised and lowered relative to the sump and the dome 20 to position the weir relative to thestock level inthe box. 'Stock: is delivered through the inlet 26 while water is delivered through inlet 24 in such velocity as may be'desired'and so that in thelow'er patter the sump around the dome 20 there is a considerable turbulence thereby to insure a thorough mixing of the stock and water. The water which is admitted to the sump may be white water from a paper machine.

The mixed stock and water flow upwardly within the sump so that above the. dome there is relatively less velocity and turbulence than around the dome and adjacent the lower wall. As the mixed stock and water rise upwardly within the cylinder 28 the velocity tends to become somewhat less than at points therebelow. The mixed stock and water flow over the weir 36 into the delivery chamber which extends around the cylinder 28.

The cylinder will be raised or lowered depending upon the level of stock in the delivery chamber which for illustrative purposes is indicated'by L in Fig. 2. It is desirable that the. mixed stock and water as it flows or spills over the weir from radius providing a main portion and an outlet portion of said chamber, said lower wall provided with a sump opening and an outlet opening and disposed in the main and outlet portions of the chamber respectively, a cylindrical side wall extending downwardly from said lower wall around the sump opening therein and a lower wall secured to the lower end of said cylindrica1 side wall forming therewith a sump below said lower wall, said cylindrical wall of the sump provided with inlet means to admit water and paper stock, a hollow cylindrical gate having a lower portion within said sump and a continuous upper edge adapted for the flow of water and stock from said inlet means upwardly therethrough and over said upper edge and at all sides thereof into said the cylinder 28 does not create sufficient turbulence to create foam. The construction is such,

that it is possible for the mixed stock and water to flow uniformly at 6 from the delivery chamber with minimum turbulence and at a desired maximum velocity without the creation of foam.

The cylinder 28 may be adjusted up and down as may be desired in order to obtain the desired results. If it is desired in the broad aspects of the invention that the stock and water enter the sump at such velocity and create such turbulence as will bring about the desired mixing of the stock and water while the same flows upwardl with decreasing velocity and turbulence so that as the stock and water flowover the weir the stock is uniformly mixed and the mixed stock and water are delivered from the delivery chamber with the least turbulence consistent with the velocity desired. The weir is of considerable length thereby making it possible for a considerable flow of stock and water to take place without creating turbulence which results in foam and is objectionable. 1

It may be desired to provide dump valves in the walls 8 and I4. As shown in Fig. l valves such as 60 are pivotally connected at 62 to arms 64 of levers ,66 which pivoted at 68 to brackets 10 secured to the wall 8. An outlet member [2 is secured to said wall which has opening Hi therethrough in which valve 60 seats. By moving lever 66 upwardly the valve 60 is moved from off its seat to provide a free passageway through member 12.

The invention may be embodied in other specific forms without departing from the essential characteristics thereof. Hence, the present embodiments are therefore to be considered in all respects merely as being illustrative and not as being restrictive, the scope of theinvention being indicated by the appended claims rather than by the foregoing description, and all modifications and variations as fall within the meaning and purview and range of equivalency of the appended claims are therefore intended to be embraced therein. i

What it is desired to claim and secure by Letters Patent of the United States is: a

1. A mixing box construction comprising in combination, a horizontal lower wall and a'continuous vertical side wall extending upwardly therefrom and forming therewith a chamber, said side wall at one side of the chamber arranged in the form of a portion of a circle of certain radius and at an opposite side thereof inthe form of a portion of a circle of relatively shorter chamber, and said upper edge of the gat provided with an overflow weir extending entirely therearound. p

2. A mixing box construction comprising in combination, a horizontal lower wall and a continuous vertical side wall extending upwardly therefrom and forming therewith a chamber, said side wall at one side of the chamber arranged in the form of a portion of a circle of certain radius and at an opposite side thereof in the form of'a portion of a, circle of relatively shorter radius'providing a main portion and an outlet portion of said chamber, said lower wall provided with a sump opening and an outlet opening and disposed in the main and outlet portions of the chamber respectively, a cylindrical side wall extending downwardly from said lower wall around the sump opening therein and a lower wall secured to the lower end of said cylindrical-side wall forming therewith a sump below said lower wall, said cylindrical wall of the sump provided with inlet means to admit water and paper stock, a hollow cylindrical gate having a lower portion within said sump and a continuous upper edge 7 adapted for the flow of water and stock from said inlet means upwardly therethrough and over said upper edge and at all sides thereof into said chamber, and said upper edge of the gate provided with an overflow weir extending entirelytherearound, and operating means between the'upper sides ofsaid gate and side wall for moving said gate up and down relative to said sump.

3. A mixing box construction comprising in combination, a horizontal lower wall and a continuous vertical side wall extending upwardly therefrom and forming therewith a chamber, said side wall at one side of the chamber arranged in the form of a portion of a circle of certain radius and at an opposite side thereof in the form of a portion of a circle of relatively shorter radius providing a main portion andan outlet portion of said chamber, said lower wall provided with 'asump opening and 'anoutlet opening and disposed in the main and outlet portions of the chamber respectively, a cylindrical side wall extending downwardly from said lower wall around thesump opening therein and a lower wall secured to the lower end of said cylindrical side wall forming therewith a sump below said lower wall, said cylindrical wall of the sump provided with inlet means to admit water and paper stock, a hollow cylindrical gate having a lower portion within said sump and a continuous upper edge adapted forthe flow of water and stock from said inlet means upwardly therethrough and over said upper edge and at all sides thereof into said chamber, and said upper edge of the gate provided with an overflow weir extending entirely therearound, and operating REFERENCES CITED means between upper sides of said gate and side wall for moving said gate up and down relative The following references are of record in the to said sump, and a dome extending upwardly fi e O this patent from the lower wall of the sump having a side 5 UNITED STATES PATENTS wall spaced inwardly from the side wall of said sump and an upper wall disposedabove the hori- Number Name Date zental plane of said inlet means. 505,483 Rounds Sept- 1893 309,073 McNaught Jan. 2, 1906 GEORGE A. ENGERT. 10 2,154,719 7 Berry Apr. 18, 1939 2,393,244: Goldsmith Jan. 22, 1946 2,399,546 Edge Apr. 30, 1946 

